Use the specified authentication style when validating the
user, as allowed by /etc/login.conf. A list
of doas-specific authentication methods may be configured by adding an
‘auth-doas’ entry in
login.conf(5).

Parse and check the configuration file
config, then exit. If
command is supplied,
doas will also perform command matching. In
the latter case either ‘permit’, ‘permit
nopass’ or ‘deny’ will be printed on standard output,
depending on command matching results. No command is executed.